linked data - ncompass presentation
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LINKED DATA AND LIBRARIES: AN OVERVIEW Robin Hastings
NEKLSrhastings@nekls.org
TODAY’S TOPICS What is linked data? How is linked data being used right now?
BIBFRAME Open Library
What are some potential uses for linked data? Extending library data’s reach Reduce, Reuse, Recycle
More info: Previous NCompass Live episode at https://nlc.nebraska.gov/scripts/calendar/eventshow.asp?ProgID=14798 (Life after MARC - Cataloging Tools of the Future
This presentation:
WHAT IS LINKED DATA?
Photo Credit: https://www.flickr.com/photos/12033805@N00/2268295018/ - gerlos via Compfight - https://creativecommons.org/licenses/by-sa/2.0/
ESSENTIAL PRINCIPLES: Use URIs (Universal Resource Identifiers) as names for objects
Use HTTP URIs so people can look up those names
Provide information (at the URI) in standard form (RDF, JSON, Turtle, etc.)
Include links to other URI objects so that other objects can be discovered via links
Tim-Burners Lee, back in 2006
SEMANTICS & LINKED DATA
Photo Credit: https://openclipart.org/detail/140701/brain
RDA VS. RDFResource Description and Access (RDA)
Library-land created Describes and provides access points
for bibliographic information means of encoding metadata for
library resources Structured on FRBR Can be expressed in multiple
“languages” such as MARC21, BIBFRAME, etc.
Content descriptor, not a specific format
Resource Description Framework (RDF) WWW created Describes and provides access points
for semantically valid information on the web
means of encoding metadata for web-based resources
Structured on semantic language (OWL - Working Ontology Language)
Can be expressed in multiple “languages” such as XML, Turtle, etc.
MARC RECORD
http://kcoyle.net/bibframe/BFbook.html
BIBFRAME 1
http://kcoyle.net/bibframe/BFbook.html
BIBFRAME 2
http://kcoyle.net/bibframe/BFbook.html
BIBFRAME 3Includes Access points (Subjects, Authorities) -->
http://kcoyle.net/bibframe/BFbook.html
http://kcoyle.net/bibframe/LCbook.html
4 Main Classes
WORK - a resource reflecting a conceptual essence of the cataloging resource. (Audio, Text, title, creator, place)
INSTANCE - a resource reflecting an individual, material embodiment of the Work. (extent, format, frequency) AUTHORITY - a resource reflecting key authority concepts that have defined relationships reflected in the Work and Instance. (agent, place, temporal, topic)
ANNOTATION - a resource that enhances our knowledge about another resource when knowing, minimally, 'who' is doing the annotating is important. (reviews, etc.)
The BIBFRAME Vocabulary is comprised of the RDF properties, classes, and relationships between and among them. (bibframe.org)
OPEN LIBRARYOne page per book for every book published everRecord available in RDF or JSON web formats
By Max Schmachtenberg, Christian Bizer, Anja Jentzsch and Richard Cyganiak - http://lod-cloud.net/, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=36956792
Photo Credit: https://openclipart.org/detail/209658/food-pumpkin-pie
CURRENT USES OF LINKED DATA
Linked Data = Knowledge Graph
Google, Facebook, etc. all use LinkedData to provide knowledge (see hours,phone number, map based on address, Wikipedia entry, etc.)
Schema.org - the linked data standardused by Google -->
US GOV’T LINKED DATA Local severe weather warning systems in Missouri
Product recall data from fed government
Higher Ed datasets, including information on every institution of higher education that participates in the federal student financial aid programs
USES FOR LINKED DATA OUTSIDE THE US England: British National Bibliography (bnb.data.bl.uk) - working on
creating a repository of linked data objects based on national library holdings
Germany: Culturegraph1 - linked open data service that intends to create an individual information object for each kind of material held by libraries
in Germany (http://www.dnb.de/EN/Service/DigitaleDienste/LinkedData/linkeddata_node.html)
England: https://openclipart.org/detail/221971/big-ben-tower-illustrationGermany: https://openclipart.org/detail/240797/germany-map-flag-2
REDUCE, REUSE, RECYCLEReduce - the amount of work going into reinventing the record at each library (at least somewhat)
Reuse - the library’s data in new and exciting ways, taking advantage of linked open data on the web
Recycle - Shared MARC records - even more sharing with common URIs that all libraries can use
https://openclipart.org/detail/177461/mike-the-mic-question
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